Sound-deadening universal connector.



C. W. EBELING.

SOUND DEADENING UNIVERSAL CONNECTOR.

APPLICATION FILED AU6.20. 1913., niugwzn Mn. 19. 1918.

1,261,794, Patented Apr. 9, 19m

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QfilUND-ZDEADENING UNIVERSAL CONNECTQB.

To all whom it may concern:

Be it known that 1, Cinema W.Ennmno,

a citizen of the United States, residing at New York, in the county and State of New York, have invented new and useful Sound- Deadening Universal Connectors, of which the following is a specification.

The present invention relates to a universal connection or coupling adapted to be employed between the operating mechanism or a motion picture pro ector and a mechanism for rotating. the record platform or mandrel of a sound reproducing machine, one object of the invention being the provision of a connection or coupling oi'this character, which will permit of the proper operation of the sound carrier from the ill motion picture projector whether the shaft connections between the two are in axial alinement or not, said coupling further providing a sound deadening means, whereby the sound due to the motor mechanism of the projector mechanism is eliminated from aliecting the recordplatform and disk or cylinder so that the mechanical noise is not permitted to afiect the stylus of the sound reproducing mechanism.

, A further object'of the present invention is the provision of a simple coupling of this character, which constitutes primarily, two disks, the adjacent faces of which are convexed, thereby constituting a joint which will permit of the proper disposition of the disks relative to each other and whereby the centers thereof will not have to he in axial alinement, there being interposed between the disks and connected thereto, a flexible connecting medium, made oil" a sound deadening material, as for instance leather, which will permit of the proper flexing of the connection and yet at thets'ame time insure a positive rotation ofthe shaft operating the wand reproducing mechanism from the projector mechanism.

- With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can he made within the scope of what is claimed without departing from the spirit otthe inven; tion,

Specification of Letters Patent.

Patented Apr. d, 319313.

. Renewed January 19, 1918. serial Ito. amass.

In the drawings- Figure 1 is a view in elevation of a portion of a projector mechanism and a portion of a sound reproducing device, showing two of the couplers connecting the two devices.

Fig. 2 is an enlarged detail view of one of the couplings, dotted lines illustrating an extreme flexing position permitted thereby.

Fig. 3 is a sectional View taken upon line 3-3 of Fig. 2. i

Fig. 4 is a plan view of the flexibledisk disposed between the concave faces of the main disks of the coupling.

Fig. 5 is a plan view of a modified form of flexible connector.

Referring to the drawings, the projector v mechanism P, is to be taken indicative of any form of motion picture projector, while the sound reproducing device S is indicative of any form of sound reproducing machine that is not operated by a motor, in the present instance, a mandrel or cylinder machine being shown, and the projector device being the sole. instrumentality by means of which the sound record carrier is operated.

It is desirable in this form of apparatus, that the mechanical noise due to the opera tion of the motor of the projector, be prevented trom adecting the stylus of the sound reproducing mechanism" and both mechanisms must be connected for synchronous operation. The shafts l, 2 and 3, as clearly illustrated in Fig; l, are connected by two the positioning of the same, the shafts be moved out of alinement. the proper transmission of power from the projector to the sound record carrier can be carried out.

lln order to provide a. means for properly connecting the disks 4 and 5 together, and at the same time act as a sound deadening 'or damping means therebetween, a disk 8,

which is preferably made of leather, or of any other flexible material that will produce the necessary connection for simultaneous rotation between the disks 4- and 5, is em- Mill ployed. It may be said, however, that the member 8 may not of necessity be a disk, as it may be provided with four terminals 8', as clearly shown in Fig. 5.

In order to properly connect the flexible disk 8 to the coupling disks 4 and 5, screws or other fastenings 9 are disposed to connect the periphery of the disk at diametrically opposite points to the convex face 6 of the metal disk 4 while screws 10 are disposed at right angles to the screws 9 to connect the disk 8 at diametrically opposite points to the disk 5.

By this means it will be seen that the point of contact between the metal disks 4 and 5 will always have interposed therebe tween as at 11 in Fig. 3, a portion of the flexible disk 8, and that as the connections 9 and 10 are quartering as relates to each other, the desirable flexibility is provided between the disks 4 and 5, so that the same may assume the various positions that are permitted in any form of universal joint.

What is claimed is:

1. A sound deadening universal joint cou pling, comprising two disks, the faces of which are convexed, and a flexible connecting disk disposed between and connected altierrliately at four, points, two points to each 2. A sound deadening universal joint coupling, comprising two disks, the faces of which are convexed, and a flexible connecting disk between the two disks and connected alternately at four points, two to each naemea.

disk, a portion of the flexible disk being 'abutted upon both sides by the first two disks connecting medium connected to the con vex faces of both disks.

fl. A sound deadening universal joint cou phng, comprising two disks, the adjacent faces of which are convex, and a flexible connecting medium connected to the convex faces of both disks, such connection of the medlum being at four points, two to each disk, so that the line joining the points of connection of the flexible connecting medium to one disk is at right angles to the line ]01Illllg the points of connection of said me dium to the other disk.

5. A universal coupling, including two disks having each a convex face, a sheet of the convex faces of both disks, there being a two point connection to each disk, and the connections to one disk being at right angles to the connections to the other disk.

In testimony that I claim the foregoing as my own, I have hereto aflixed my signature in the presence of two witnesses.

CHAS. w. EB IJI G.

Witnesses:

MAY MULLANE, FRED. J. WHELAN.

. flexible material connected at four points to 

